GHSA-WHQG-PPGF-WP8C Astro has an Authentication Bypass via Double URL Encoding, a bypass for CVE-2025-64765

Authentication Bypass via Double URL Encoding in Astro Bypass for CVE-2025-64765 / GHSA-ggxq-hp9w-j794 --- Summary A double URL encoding bypass allows any unauthenticated attacker to bypass path-based authentication checks in Astro middleware, granting unauthorized access to protected routes. Whi...

Astro has an Authentication Bypass via Double URL Encoding, a bypass for CVE-2025-64765

Authentication Bypass via Double URL Encoding in Astro Bypass for CVE-2025-64765 / GHSA-ggxq-hp9w-j794 --- Summary A double URL encoding bypass allows any unauthenticated attacker to bypass path-based authentication checks in Astro middleware, granting unauthorized access to protected routes. Whi...

Use of Non-Canonical URL Paths for Authorization Decisions

Overview astro is an Astro is a modern site builder with web best practices, performance, and DX front-of-mind. Affected versions of this package are vulnerable to Use of Non-Canonical URL Paths for Authorization Decisions due to improper URL decoding logic. The pathname validation used for...

PT-2025-48291

Name of the Vulnerable Software and Affected Versions Astro versions 5.15.7 and below Description Astro, a web framework, is affected by a double URL encoding bypass. This allows unauthenticated attackers to bypass path-based authentication checks in Astro middleware, potentially granting...

Insertion of Sensitive Information Into Sent Data

Overview @sentry/astro is an Official Sentry SDK for Astro Affected versions of this package are vulnerable to Insertion of Sensitive Information Into Sent Data via the sendDefaultPii configuration option. An attacker can gain access to sensitive HTTP headers, such as authentication cookies, by...

CVE-2025-64757

Astro is a web framework. Prior to version 5.14.3, a vulnerability has been identified in the Astro framework's development server that allows arbitrary local file read access through the image optimization endpoint. The vulnerability affects Astro development environments and allows remote...

CVE-2025-64765

Astro is a web framework. Prior to version 5.15.8, a mismatch exists between how Astro normalizes request paths for routing/rendering and how the application’s middleware reads the path for validation checks. Astro internally applies decodeURI to determine which route to render, while the...

CVE-2025-65019

Astro is a web framework. Prior to version 5.15.9, when using Astro's Cloudflare adapter @astrojs/cloudflare with output: 'server', the image optimization endpoint /image contains a critical vulnerability in the isRemoteAllowed function that unconditionally allows data: protocol URLs. This enable...

Cross-site Scripting (XSS)

Overview @astrojs/internal-helpers is an Internal helpers used by core Astro packages. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the isRemoteAllowed function. An attacker can execute arbitrary JavaScript in the victim's browser by submitting a crafted SVG...

Astro Cloudflare adapter has Stored Cross-site Scripting vulnerability in /_image endpoint

Summary A Cross-Site Scripting XSS vulnerability exists in Astro when using the @astrojs/cloudflare adapter with output: 'server'. The built-in image optimization endpoint /image uses isRemoteAllowed from Astro’s internal helpers, which unconditionally allows data: URLs. When the endpoint receive...

@1771technologies/oneplay (>=0.0.1, <=0.0.6), @antonyfaris/prefix-node-builtins (>=1.0.0, <=1.0.1) +35 more potentially affected by CVE-2025-65019 via astro (>=5.0.0-beta.5, <=5.15.6)

astro NPM version =5.0.0-beta.5, =0.0.1, =1.0.0, =0.5.0, =1.0.0, =0.0.1, =0.1.0, =0.0.1, =2.18.7, =1.25.426-4, =0.6.2, =0.1.2-alpha.1, =0.0.28, =0.0.40 and more Source cves: CVE-2025-65019 Source advisory: OSV:GHSA-FVMW-CJ7J-J39Q...

EUVD-2025-198182

Astro Cloudflare adapter has Stored Cross Site Scripting vulnerability in /image endpoint...

GHSA-FVMW-CJ7J-J39Q Astro Cloudflare adapter has Stored Cross-site Scripting vulnerability in /_image endpoint

Summary A Cross-Site Scripting XSS vulnerability exists in Astro when using the @astrojs/cloudflare adapter with output: 'server'. The built-in image optimization endpoint /image uses isRemoteAllowed from Astro’s internal helpers, which unconditionally allows data: URLs. When the endpoint receive...

Directory Traversal

Overview astro is an Astro is a modern site builder with web best practices, performance, and DX front-of-mind. Affected versions of this package are vulnerable to Directory Traversal via a mismatch in path normalization between routing and middleware validation. An attacker can access protected...

GHSA-GGXQ-HP9W-J794 Astro's middleware authentication checks based on url.pathname can be bypassed via url encoded values

A mismatch exists between how Astro normalizes request paths for routing/rendering and how the application’s middleware reads the path for validation checks. Astro internally applies decodeURI to determine which route to render, while the middleware uses context.url.pathname without applying the...

@1771technologies/oneplay (>=0.0.1, <=0.0.6), @antonyfaris/prefix-node-builtins (>=1.0.0, <=1.0.1) +35 more potentially affected by CVE-2025-64765 via astro (>=5.0.0-beta.5, <=5.15.6)

astro NPM version =5.0.0-beta.5, =0.0.1, =1.0.0, =0.5.0, =1.0.0, =0.0.1, =0.1.0, =0.0.1, =2.18.7, =1.25.426-4, =0.6.2, =0.1.2-alpha.1, =0.0.28, =0.0.40 and more Source cves: CVE-2025-64765 Source advisory: SNYK:JS-ASTRO-14059661...

@1771technologies/oneplay (>=0.0.1, <=0.0.6), @antonyfaris/prefix-node-builtins (>=1.0.0, <=1.0.1) +35 more potentially affected by CVE-2025-64765 +1 more via astro (>=5.0.0-beta.5, <=5.15.6)

astro NPM version =5.0.0-beta.5, =0.0.1, =1.0.0, =0.5.0, =1.0.0, =0.0.1, =0.1.0, =0.0.1, =2.18.7, =1.25.426-4, =0.6.2, =0.1.2-alpha.1, =0.0.28, =0.0.40 and more Source cves: CVE-2025-64765, CVE-2025-66202 Source advisory: OSV:GHSA-GGXQ-HP9W-J794...

EUVD-2025-198183

Astro's middleware authentication checks based on url.pathname can be bypassed via url encoded values...

Cross-site Scripting (XSS)

Overview astro is an Astro is a modern site builder with web best practices, performance, and DX front-of-mind. Affected versions of this package are vulnerable to Cross-site Scripting XSS via the /server-islands/name endpoint when handling the e, s and p parameters. An attacker can execute...

Astro vulnerable to reflected XSS via the server islands feature

Summary After some research it appears that it is possible to obtain a reflected XSS when the server islands feature is used in the targeted application, regardless of what was intended by the component templates. Details Server islands run in their own isolated context outside of the page reques...